Abstract

Diabetes mellitus is a chronic metabolic disorder characterized by persistent hyperglycemia, insulin resistance, and 
progressive β-cell dysfunction, leading to severe microvascular and macrovascular complications. Despite the 
availability of conventional therapies, challenges such as side effects, high costs, and limited accessibility have 
prompted growing interest in medicinal plants as complementary or alternative treatments. Numerous plants, 
including Momordica charantia (bitter melon), Trigonella foenum-graecum (fenugreek), Cinnamomum verum 
(cinnamon), Panax ginseng (ginseng), and Aloe vera, have shown hypoglycemic, insulin-sensitizing, antioxidant, 
and anti-inflammatory activities through diverse mechanisms such as β-cell regeneration, modulation of glucose 
metabolism, inhibition of carbohydrate-digesting enzymes, and enhancement of insulin sensitivity. Preclinical and 
clinical studies suggest that phytochemicals, including flavonoids, alkaloids, saponins, and phenolic compounds, 
exert significant anti-diabetic effects. However, concerns remain regarding standardization, safety, herb–drug 
interactions, and regulatory oversight. This review synthesizes current evidence on medicinal plants in diabetes 
management, highlighting mechanisms, clinical findings, safety considerations, and future perspectives for their 
integration into modern healthcare.